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计算机工程 ›› 2018, Vol. 44 ›› Issue (12): 168-172. doi: 10.19678/j.issn.1000-3428.0049025

• 安全技术 • 上一篇    下一篇

物理层加密算法的频谱分析攻击方法

高宝建,胡云,胡丽娜   

  1. 西北大学 信息科学与技术学院,西安 710127
  • 收稿日期:2017-10-20 出版日期:2018-12-15 发布日期:2018-12-15
  • 作者简介:高宝建(1963—),男,副教授,主研方向为物理层安全、通信信号处理;胡云(通信作者)、胡丽娜,硕士研究生
  • 基金资助:

    陕西省自然科学基金(2017JM6012)

Spectrum Analysis Attack Method of Physical Layer Encryption Algorithm

GAO Baojian,HU Yun,HU Li’na   

  1. Department of Information Science and Technology,Northwest University,Xi’an 710127,China
  • Received:2017-10-20 Online:2018-12-15 Published:2018-12-15

摘要:

现有物理层加密算法的设置及安全性分析多数在基带进行,忽视了频谱泄漏对算法安全性的威胁。为此,在分析OFDM信号频谱特点的基础上,设计一种频谱分析攻击方法。通过建立信息或者密钥符号与密文信号频谱具体频率分量之间的一一对应关系,获取信息、密钥以及调制方式。实例分析和仿真结果表明,该方法对不同参数的M-OFDM算法破解效果较好,能够正确识别其信息符号。

关键词: 物理层安全, 频谱分析, 正交频分复用, 频谱泄漏, 基带

Abstract:

Most of the existing physical layer encryption algorithms setting and security analysis are carried out on baseband,ignoring the threat of spectrum leakage to the security of the algorithm.On the basis of analyzing the spectrum characteristics of Orthogonal Frequency Division Multiplexing(OFDM)signal,a spectrum analysis attack method is designed.By establishing a one-to-one correspondence between the information or key symbol and the frequency component of the ciphertext spectrum,the information,key and modulation mode can be obtained.The example analysis and simulation results show that the method has good effect on the M-OFDM algorithm with different parameters and can recognize the information symbols correctly.

Key words: physical layer security, spectrum analysis, Orthogonal Frequency Division Multiplexing(OFDM), spectrum leakage, baseband

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